Electrically-heated tool.



J. 8. HANSEN. ELECTRICALLY HEATED TOOL.

APPLICATION FILED M1614, I912- Patented Apr. 20, 1915.

[7 [5 S. [Wm/70R.

. 4 is a sectional UNITE STATES PATENT OFFICE.

JOHN S. HANSEN, BROCKTON, MASSACHUSETTS, ASSIGNOR TO 0. A. M ILLER TREE IN G- MACHINE COMPANY, OF PORTLAND, MAINE, A CORPORATION OF MAINE.

ELECTRICALLY-HEATED TOOL.

Specification of Letters Patent.

Patented Apr. 20, 1915.

Application filed August 24, 1912. Serial No. 716,843.

To all whom it may concern:

Be it known that I, JOHN S. HANSEN, a citizen of the United States, residing at Brockton, in the county of Plymouth and Commonwealth of Massachusetts, have invented certain Improvements in Electricallylleated Tools, of which the following description, in'connection with the accompanying drawings, is a specification, like reference characters on the drawings indicating like parts in the several figures.

This invention relates to electrically heated tools and is herein disclosed as embodied in a treeing iron. of the type commonly used in shoe factories to smooth out the uppers of boots and shoes.

The invention aims particularly to devise an electrically heated tool which shall afford ready access to the heating resistance, which shall have provision for protecting the supply conductors for the resistance and which can be cheaply manufactured.

The invention will be readily understood -from the following description when read in connection with the accompanying drawings, in which,

Figure 1 is a view in side elevation of a treeing iron embodying thisinvention; Fig. 2 is a central longitudlnal sectional view of the iron shown in Fig. 1; Fig. 3 is a sectional view on the line 33, Fig. 2; and Fig.

Referring to the drawings, 2 body of the tool which is of a common shape, and is drilled from one end nearly through to the other to form a chamber for a heating resistance unit 4. This resistance unit has a substantially cylindrical body and an oblong projection 6 at one end that supports two binding posts 7.and fits snugly 9, see Fig. 4, formed in one end of the body. The opposite end of the body is provided wit a cover plate 8 shaped to close the chamber, this cover being held in position by two screws 10. A rod 12 is fixed in the cover 8 and carries a handle 14 which is secured thereon by a nut threaded on the end of the rod and operatin to clamp the handle against a shoulder ormed on the rod.

Two rods 16 are threaded into the end of the body 2 opposite the cover 8 and extend through a handle 18 which is clamped rigidly thereon by means of 'cotiperating collars 20 and nuts 22.v Formed through this view on the line 44, Fig. 2. 3 body of the iron far enough to indicates the in a slot handle is an axial bore 24 for the reception of a pair of conductors 26 that are connected to the binding posts 7 of the resistance unit 4, and serve to conduct current thereto. A sleeve 28 of insulating material fits snugly over the b nding posts and the adj acentportlons of the conductors which otherwise would be exposed and in danger of. becomor of being touched by the workman. Since the forces tending to 11 the conductors out of the handle when the tool 1s in use, might disturb the connection between the conductors and the resistance, the conductors are both fastened to the tool at a point back of their connection with the binding posts by means of a split clamp 30 having portions that embrace rods 16 and other portions embracing the conductors. A screw 32 binds the parts of the clamp securely on the rod and conductors. A closely wound spiral spring 34,

' through which the conductors 26 extend, is

fitted snugly into the outer end of the bore 24 and prevents the kinking or too abrupt bending of the conductors.

Assuming the parts to be assembled in the condition shown, the resistance may be removed by taking oil the cover plate 8, loosening the clamp 30 and pushing the conductors 26 through the handle until the resistance unit 4 has been moved out of the enable the workman to get hold of it. It may then be pulled entirely out of the iron and disconnected from the conductors. To' replace it,

it is merely necessary to reverse these opera- 1 tions.

claim as new and desire to secure by Letters Patent of the United States is 1. A treeing iron comprising a body hav ing a chamber for the reception of a heating resistance, a pair of opposite handles for said body, a plurality of rods rigidly supported by said body and extending into and supporting one of said handles, an electrical conductor for said resistance extending through said handle, and a cover for said chamber supported by one of said handles and removable from said body independently of the other handle.

2. A treeing iron comprising a body having a chamber for the reception of a heating resistance, a handle having a bore formed therethrough, two rods supported rigidly in Having thus described my invention, what said body, and extending through said hanan axial bore formed therethrough, supply die at opposite sides of said bore, coiiperatconductors extending through said bore an ing collars and nuts on said rods for clampconnected to said resistance, a clamp eming the handle thereon, supply, conductors bracing said conductors and one of said 20 6 for said resistance extending through said rods, and an insulating sleeve positioned bore, and means for clamping said conducbetween said rods and inclosing the connec tors to a part of the iron at a point behind tion between said conductors and said resisttheir connection with the resistance. ance. p 3. A treeing iron comprising a body havs In testimony whereof I have signed my 25 10 ing a chamber formed longitudinally therea name to this specification in the presence of thrgugkh, as heating resiksfance pofsitioned two subscribing witnesses. sm 0 am er, aremova ecover' or one en a a of said chamber, a handle supported by said a 1 JOHN H cover, two rods supported rigidly in the end Witnesses: 15 of said body opposite said cover, a handle JOHN H. GORDON,

supported onsaid rods, said handle having -CHARLES H. Honmns. 

